JP2522654B2 - Internal fluid suction and discharge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a device for sucking and discharging body fluid or body stored gas. More specifically, the present invention is disclosed in Japanese Patent Application No. 60-175.
No. 461 (Shokai Sho 62-84435) relates to an improvement of the body fluid suction / discharge device proposed by the applicant.

[Prior Art and Problems Thereof] The body fluid suction and discharge device proposed by the present applicant in this prior application includes a double valve body having three openings, and two check valves are arranged in the double valve body. One of the three openings is connected to the indwelling catheter, the other opening is connected to the syringe, and the remaining opening communicates between the two check valves. The remaining opening is connected to the drainage tube. Further, in this prior application, a bypass tube for adjusting and connecting the tube of the indwelling catheter and the drainage tube is provided for the purpose of performing natural drainage of body fluid by gravity. , The bypass tube is closed with a clamp. Since the natural discharge of body fluid is often performed, it is usual to provide such a bypass tube in the body fluid suction / discharge apparatus as described above.

In the invention of Japanese Utility Model Application No. 60-175461, a double check valve is used instead of a three-way stopcock for some reason. However, when a bypass tube is provided, it can be used to open and close the bypass tube. There are problems with using clamps. That is, when the clamp is released after being closed with the clamp, compressive strain remains in the tube portion, the lumen is narrowed, and smooth drainage is impaired. Also, the clamping operation is time-consuming and the reliability of the seal is low.

Also, during natural discharge by gravity, pressure is applied to the outlet side of the discharge tube for some reason, and the liquid or gas being discharged flows back into the body,
May cause infection.

[Means for Solving Problems] In order to solve the problems associated with the use of the above clamp,
According to the present invention, a three-way stopcock is used in addition to the double check valve body. In this case, by operating the three-way stopcock, the indwelling catheter side and the discharge side can be connected via the double check valve body, or the indwelling catheter and the discharge side can be directly connected for spontaneous discharge.

Further, according to the present invention, a check valve is provided on the downstream side of the three-way stopcock in order to prevent the fluid from flowing back into the body due to the pressure from the discharge side during the natural discharge operation.

[Effect] According to the present invention, it is possible to solve the problem caused by the use of the clamp and prevent the backflow of the fluid into the body under all conditions.

[Examples] Hereinafter, the present invention will be described by examples with reference to the accompanying drawings. It should be understood that the same reference numerals denote the same parts throughout the accompanying drawings.

First, referring to FIG. 1, the body fluid suction / discharge device shown here includes a double check valve device 10.
10 may have the same structure as that described in Japanese Utility Model Application No. 60-175461 (Japanese Utility Model Application No. 62-84435), but the structure shown in FIG. 1 will be briefly described here.

The dual check valve device 10 includes a T-shaped valve housing 12, which has three openings 14, 16, 18. Check valves 2 are provided in the first and second openings 14 and 16, respectively.
0 and 22 are arranged. The check valve 20 in the first opening 14 has a structure that allows the fluid to flow from the outside into the first opening 14, but prevents the fluid from flowing out from the first opening 14 to the outside. The check valve 22 in the second opening 16 is the second opening from the outside.
The structure prevents the inflow of the fluid into the inside 16 but allows the outflow of the fluid from the second opening 16 to the outside. The third opening 18 located between the check valves 20, 22 has means (not shown) for sealingly receiving the working tip of the syringe 24. In such an arrangement, the piston of the syringe 24
Upon actuation of 24A and the first aspiration, fluid is drawn into the valve housing 12 through the first opening and then the syringe.
When 24 is operated in the discharge stroke, the fluid sucked in the valve housing 12 is discharged through the second opening 16. Check valves in the first and second openings 14, 16 respectively
Due to the provision of 20, 22, no fluid will be sucked into the valve housing 12 through the second opening 16 during the suction stroke of the syringe 24 and will flow out through the first opening 14 during the discharge stroke of the syringe 24. There is nothing to do. Therefore, only by reciprocating the piston 24A of the syringe 24, the fluid flows into the valve housing 12 through the first opening portion 14 and the fluid flows out of the valve housing 12 through the second opening portion 16, and the cycle is repeated. Become.

According to the invention, the first connection opening 28 of the three-way stopcock 26 is sealingly connected to the first opening 14 of the double check valve device 10.
The second connection opening 30 of the three-way stopcock 26 is hermetically connected to the proximal end 34 of a well-known tubular indwelling catheter 32, and the opposite end of the indwelling catheter 32 is a suction end 36 to be indwelled in the body.
Has become.

The third connection opening 38 of the three-way stopcock 26 has a discharge tube 40.
A lid 44 is sealedly connected to one end 44 of the end 42. The other end 46 of the lid 42 of the discharge tube 40 is sealingly connected to the second opening 16 of the double check valve device 10. The opposite end 48 of the drain tube 40 is connected to a suitable drain fluid reservoir 50, such as a reservoir bag or bottle.

According to this structure, the forced fluid suction and discharge work using the double check valve device 10 and the natural discharge work by gravity can be performed only by switching the three-way stopcock 26 without using any clamp.

2 to 4 show various different arrangements according to the invention, as can be seen, a three-way stopcock is sealingly connected to the inflow side of the double check valve device 10 and the inflow side of the discharge tube 40. Various forms of fitting 52, 54, 56, 58 may be used as described.

When pressure is applied to the discharge end side of the discharge tube 40 when the three-way stopcock 26 is in the natural discharge position, for example,
If the storage bag 50 is inadvertently squeezed, the drain tube 40
Fluid may flow back through the indwelling catheter 32 and back into the body. In order to solve this problem when using the three-way stopcock 26, according to the present invention, as shown in FIG. 5, the third connecting opening 30 of the three-way stopcock 26 and the corresponding lid end 44 of the discharge tube 40 are shown. Another check valve 60 is provided between the two. Further, according to the present invention, as shown in FIG. 6, a check valve 62 is provided at an arbitrary position (including the discharge end of the discharge tube 40) on the downstream side of the confluent portion 42A of the lid portion of the discharge tube 40. It may be provided. It should be noted that such an additional check valve is preferably constructed so as not to impede the forward flow of fluid, and a "Heimlich valve" well known in the art may be suitable.

[Brief description of drawings]

FIG. 1 is a schematic external view of a body fluid suction / discharge device according to the present invention. 2 to 4 are views showing various connection arrangement examples of the three-way stopcock according to the present invention. FIG. 5 is a diagram showing another embodiment according to the present invention. FIG. 6 is a diagram showing still another embodiment according to the present invention. In the drawing, 10 ... Double check valve device, 12 ... Valve housing, 14 ... First opening, 16 ... Second opening, 18 ... Third opening, 20, 22 ... Check Valve, 24 ... Syringe, 26 ... Three-way stopcock, 28 ... First connection opening, 30 ... Second connection opening, 32 ... Indwelling catheter, 38 ... Third connection opening, 40
...... Discharge tube, 42 ...... Lid end, 50 ...... Discharge fluid storage part, 52 to 58 ...... Pipe fitting, 60, 62 ...... Check valve

Claims (3)

(57) [Claims] 1. A valve housing having three openings, and a valve housing provided in the valve housing adjacent to the first opening to permit the inflow of fluid into the first opening from the outside. A first check valve for blocking the outflow of fluid from the first opening to the outside, a first check valve provided inside the housing adjacent to the second opening, and to the outside from the second opening Between the first and second check valves of the valve housing and the second check valve that allows the outflow of fluid from the outside but blocks the inflow of fluid from the outside into the second opening. A double check valve body provided in the third opening located therein and including means for sealingly receiving the working tip of the syringe; and one end serving as a suction end to be left in the human body. Indwelling catheter with a lid on one end and two connection openings Body fluid suction and discharge including a discharge tube in which one of the two connecting openings is connected to the second opening of the double check valve body, and the opposite end is a discharge end communicating with the outside. The device has three connection openings, the first connection opening being the first of the double check valve bodies.
A second connection opening is sealingly connected to the opening, a second connection opening is sealingly connected to the opposite end of the indwelling catheter, and a third connection opening is sealed to the other connection opening at the lid or end of the discharge tube. A body fluid suction / ejection device including a connected three-way stopcock. 2. A valve housing having three openings, and a valve housing provided in the valve housing adjacent to the first opening to allow inflow of a fluid from the outside into the first opening. A first check valve for blocking the outflow of fluid from the first opening to the outside, a first check valve provided inside the housing adjacent to the second opening, and to the outside from the second opening Between the first and second check valves of the valve housing and the second check valve that allows the outflow of fluid from the outside but blocks the inflow of fluid from the outside into the second opening. A double check valve body provided in the third opening located therein and including means for sealingly receiving the working tip of the syringe; and one end serving as a suction end to be left in the human body. Indwelling catheter with a lid on one end and two connection openings Body fluid suction and discharge including a discharge tube in which one of the two connecting openings is connected to the second opening of the double check valve body, and the opposite end is a discharge end communicating with the outside. The device has three connection openings, the first connection opening being the first of the double check valve bodies.
A second connection opening is sealingly connected to the opening, a second connection opening is sealingly connected to the opposite end of the indwelling catheter, and a third connection opening is sealed to the other connection opening at the lid or end of the discharge tube. A three-way stopcock that is connected, the other connection opening at the lid or end of the discharge tube, and a third one of the three-way stopcock.
And a check valve provided between the connection openings of the body fluid suction and discharge device. 3. A valve housing having three openings and a valve housing provided adjacent to the first opening in the valve housing to allow the inflow of a fluid from the outside into the first opening. A first check valve for blocking the outflow of fluid from the first opening to the outside, a first check valve provided inside the housing adjacent to the second opening, and to the outside from the second opening Between the first and second check valves of the valve housing and the second check valve that allows the outflow of fluid from the outside but blocks the inflow of fluid from the outside into the second opening. A double check valve body provided in the third opening located therein and including means for sealingly receiving the working tip of the syringe; and one end serving as a suction end to be left in the human body. Indwelling catheter with a lid on one end and two connection openings Body fluid suction and discharge including a discharge tube in which one of the two connecting openings is connected to the second opening of the double check valve body, and the opposite end is a discharge end communicating with the outside. The device has three connection openings, the first connection opening being the first of the double check valve bodies.
A second connection opening is sealingly connected to the opening, a second connection opening is sealingly connected to the opposite end of the fluid catheter, and a third connection opening is sealed to the other connection opening at the lid or end of the discharge tube. An intracorporeal fluid suction / exhaust device comprising: a three-way stopcock connected to the exhaust pipe; and a check valve provided between the discharge end and the confluence of the lid or end of the exhaust tube.